"M" style large bobbins #B9117-201-000,  steel (nickel plated) with  knurled stem for quick winding for JUKI. 

Sold in pack of 5 pcs.    

Precision made in Taiwan.

Size:  25.4x10.8x6mm 

Fits Juki models: DDL-201/560/5600; DNU-241H, DSU-144/145/141H

etc.